A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5855-00-361-0167
NSN 6130-00-350-9578
NSN 5990-00-721-3928
NSN 6145-01-597-8473
NSN 5920-00-336-9055
NSN 5960-01-009-5983
NSN 6645-00-715-1531
NSN 5915-00-503-4842
NSN 5925-00-549-5825
NSN 5960-01-142-1995
NSN 5945-01-237-5447
NSN 6650-00-486-7924